problem on average

Expert replies

madhushree: Newbie | Next Rank: 10 Posts; Posts: 2; Joined: Thu Aug 25, 2011 6:42 am; Thanked: 1 times

by madhushree » Fri Dec 09, 2011 6:27 pm

The average of 50 numbers is 38. If two numbers 45 and 55 are discarded, the average of the remaining set of numbers is:

a.88.5

b.36

c.37

d.36.5

e. 37.5

please can u solve this

source: jumbo tests

Like this post

Source: Beat The GMAT — Problem Solving | Fri Dec 09, 2011 6:27 pm

adamz: Junior | Next Rank: 30 Posts; Posts: 17; Joined: Sat Oct 03, 2009 2:41 pm

by adamz » Fri Dec 09, 2011 10:57 pm

The average of 50 numbers is 38. This means total of 50 numbers is 1900 (i.e 50*38)

If two numbers 45 and 55 are discarded=> New total = (1900-(55+45))=1800

So new average= 1800/48 (48 because two numbers discarded)

New Average=37.5

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

559 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review